Greynets

Internet communications have evolved from point-to-point channels such as email to real-time, presence-oriented communications like IM, P2P file sharing, Skype, and web conferencing. FaceTime terms these real-time communications applications 'greynets' - defined as network-enabled applications that are often downloaded and installed by the end user without the permission or knowledge of the IT department and use highly evasive techniques to circumvent the existing security infrastructure.